From: W.J. Llope (llope_at_physics.rice.edu)
Date: Tue Mar 18 2003 - 18:25:58 EST
...sounds like a good plan, thanks frank...
zhangbu, i haven't noticed any email from you (on any list)
since SQM - are you even back at bnl now? and if so do you
have time tomorrow morning for this? if not, let us know
and in that case perhaps lijuan could help w/ these tests?
just double checking, thanks,
bill
On Tue, 18 Mar 2003, Frank Geurts wrote:
> Zhangbu,
> i hope you made it back safely from foggy N.C.
> Could you use tomorrow's access to check some issues we have w/ the TCD.
> You're on the tofp-list so you probably saw all the messages about the
> alleged TOF-hangs-STARdaq problem. By now, more and more circumstantial
> evidence points again at the TCD or the translator unit we use to
> convert the TCD signals for the BiRa.
>
> I would like to do a simple test during tomorrows access: we ask Tonko
> to run a pedAsPhys with TPC+TOF and once the system hangs you can check
> on the platform where and how that busy is generated. If you look at
> John's diagram the busy is an OR of three inputs. I claim that the TOFp
> DAQ Busy (Jorway41 J11) is cleared. However, I am not sure about the L0
> TCD pulse (a direct feed from the TCD front-panel Out-2) or potential
> problems with the TOF System Busy Latch (PS794 2-6-1), although the
> latter doesn't show up in any standalone test we've done so far ...
>
> Also, it would be nice if you could talk to the trigger folks and get
> them to recheck the connections to and from the TOF TCD and maybe
> explain a little more what was done during last access (how far is the
> TOF TCD located from the FPD TCD???)
>
> If this doesn't work out we'll use next weeks access to diagnose this
> further but won't be able to run for the rest of the dAu run.
>
>
> Comments? Anybody?
>
> cheers,
> frank
>
>
--
_________________________________________________________
W.J. Llope, Ph.D. Res. Assoc. Professor
http://wjllope.rice.edu/default.html
llope_at_physics.rice.edu
T.W. Bonner Nuclear Lab.
Rice University, MS-315
6100 S. Main phone: 713-348-4741
Houston, TX 77005-1892 fax: 713-348-5215
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